Sash-lock.



J. C. BACKUS.

SASH LOCK.

APPLICATION FILED Aue.28. ISIS.

Patented Feb. 22,1916.

2 SHEETSSHEET I.

JOHN cLAYToN-BAcKUs, or sivin'rnronr, PEn sYtvAnIA.-* r r ,sAsH-LocK.

To allwhom'z'tmay concern: 7

Be it known that I, JOHN CLAYTON Backus, a citizen ofthe United States, residing at Smethport, in the county ofiMc- Kean-and State of Pennsylvania,'have-invented certain newand useful Improvements in Sash-Locks,'of which the follow-i ing is a specification. 7

This invention relates to sash locks and the object of the invention'is to provide a simple, inexpensive "and efficient device which may be readily applied to any win-: dow and efiectually lock the same against opening from the outside of the building, while at the same time permitting it tobe adjustedto anopen position by a person within the room. I l One object of the invention is to provide a device for the statedpurpose Which, when in use, will be substantially concealed between the sash and the window frame. and which will not interfere with the proper movement of the sash. r v V The invention is illustrated in the accompanying drawings and consists in certain novel features which will'firstbe'fully described and then more particularly pointed out in the claims following the description.

In the accompanying drawings: Figure l is a perspective view of a portion ofv a window, showing my Limproved lock applied thereto; Fig. 2 is an enlarged front elevation with parts broken away and in section;

Fig. 3 is a horizontal section on the line 33 of Fig. 2; Fig. 4: is a detail perspective view of the parts of the device disassembled but in their approximately relative ipositions; Fig. 5 is an enlarged vertical section through the holding dog and the casing for the same; Fig. 6 is a detail elevation, showing the lock for the lower sash held in an inoperative position. I

The window-frame l and the sashes 2 may be of any preferred construction and form no part of my invention. Each sash is pro.- vided with a longitudinal recess 3 in its side edge which, when the sash is-inposition, will be concealed by the window-frame, the

parting strip 4: and the bead 5, as shown most clearly in Fig 3. \Vithin this recess 3, I secure a rack bar 6 which has one. edge 7 free and turned so as to lie parallel with'and adjacent the inner edge of the parting strip or the front bead, as the case may be and this free bent .edge is constructed with ratchet teeth 7 having their longer sides'inclined toward the sash and their shorter sides at a-right angle to the side edge of'the sash so as to presentpositive. abutments to I the action of the-dog presently mentioned.

It will be understoodfithat theseracks or V holding bars. are:sofdisposed that in. the

closinggmovement of the sash, the inclined edges 8, will. ride readily over and past the holding dog but, upon an attempt being made-to open the sash, the shorter edge 7 of the ratchet teeth will be'brought squarely against the free end of the holding'dog so if:

that the opening movement will -be posi- .tively resisted unless the dog is released a manner which will be set forth.

J The rack bars Y or holding racks will be blanks'in opposite directions." The bars will,

of course,,be provided with suitable openings9 through which fasteningdevices may be inserted to secure them in position, as indicated atl0. a The holding dog 11 consists of a -sheet metal blank bent'to provide the spaced lugs orperforated ears -12 atone end and provlded along one edge with a handle memberlit-which is so shaped as'to project outwardly .betweenthe sash. and the bead or the parting strip and then bent at right r angles to provide the tip 14 to which pres? sure maybe applied by the finger of the user, when-desired]: This arrangement is shown most clearly in Fig. 3 of. the drawings. The dog is pivotally hung within a casing. 15 which is,v also struck up out of sheet metal and fits snugly within a recess or socket in thewindow frame,,as shown at 16, perforatedlugs or ears 17 being PLO.

vided atfthe upper and lower ends of the casing to facilitate thesecuring of the device I in position. 1 'A pivot pin 18 is inserted through the upper end of the casing and the lugs 12 of the dog so as to suspend-the same within the: casing, and a spring 19 is disposed withinthe casingso as to normally hold the dog vprojected in position 'to engage the teeth of the holding rack, as shown clearly in Fig. 5. This spring is illustrated as a resilient strip doubledupon itself and is very necessary that the sash may be having one branch bearing against the inner or back wall of the casing and its other branch in contact'at its-extremity'with the malnbody of the dog near the loweriend;

of the same whereby the resiliency oftlie strip willbe exerted to project the dog from the casing, as will be readily understood upon reference to Fig. ,5. i c

From the foregoing description, taken in connection. with the accompanying drawings, it will be readily understood that when the window is. closed it will be held inits closed position by the dogs engaging thesquare abutting edges of the ratchet teeth .on the As the dog is not accessible from the outside of the window, it will beaobviousthat the opening of the window, by unauthorized persons, will'be prevented, while at the same time the window. may :be very easily opened by the proper persons.

When the windows are being washed, it

moved freely and I, therefore, provide simple means whereby the lock may beheld in an inoperative position. As shown inv the drawings, I pivotally mount uponthe window frame a latch 20 which is constructed on one edge with a shoulder 21 adapted to engage over the tip 14: of the dog and also constructed at its freeend with a laterally bent portion 22 constituting a bandle by which the latch may be manipulated.

It will be readily understood that the latch will be pivoted at such a point that the shoulder 21or the tip of the latch may be swung into engagement with the finger or tip 14 of the holding dogso that when the latch is so engaged with the dog, the end of the latch will extend into the path. of

movement of said tip and thereby hold the same withdrawn into its inoperative position.

My device is exceedingly simple in'its con- .struction and free of all complicated arrangementofits parts so that it maybe produced and appliedto a window, at a very low cost. hen applied, it will be found highly efficient for the purposes for which it is designed? It will be noted that the working faces or edges of the ratchet teeth are disposed. at

a right angle to the window sash and frame I and the working edge which is engaged by the locking dog will, consequently, extend across the arc defining the path of movement of the free end-*ofthe dog; Moreover, the

.body of the dog extends from its pivotal end to 1ts working end-in a single plane free of all projections or ofisets so that thelocking strain is received squarely by the dog and does not bend nor distort the same.

Should an attempt be made to open. the window from the outside, the opening movement will be positively resisted :andthe dog.

cannot be released until after a slight-closing movement has been giventhe sash. This closing; movement obviously increases the distance which must be bridged by the intruder to reach the, tip or push button let to release the dog and tothat extent renders nug'atory his effort toraise. the window, and consequently, frustrates. his attempt; to open; the. window. A window may, there fore, be safely left. partly open for-venth latingypurposes.

Having thus described the invention, what is claimed as new is: r

1. A device for the purpose setforth com prising a holding rack consisting. of a sheet metal. plate having one edge bent laterally and provided with ratchetKteeth having their holding edges disposed at a right angle tothe longitudinal plane of the plate and their other edges inclined inwardly, a dog;

pivoted at one end and arranged to ride uponthe inclined edges of said ratchet teeth,

duringmovement of the rack in one direetion' and to extend across and engage squarely agains'tthe working edges thereof upon movement of the rack in the opposite direction, and a handle member extend.

ing from one edge of saiddog and having its extremity bent laterally to provide a pressure tip:

2. A sash holder comprising a; casing to be secured. within a window frame, a'ho-ldingrack consisting of ametal plate to be secured to a Window sash having one. longitudinal edge bent laterally andformed with. ratchet teeth, the Working edges of said teeth being. CllSPOSBda atia right angle to the line of movement ofthe sash, a dog consist ing ofa sheet metalplate havingoneend provided with lugs and ifitting within the end of the casing, and ahandle member struck from one :edge :ofthe plate inter;

mediate the ends thereof, a pivotinserted 1 arm bearing against the free end of the dog to project the same into engagementwith the holding rack.

In testimony whereof I afiix; my; sigma-i ture.

JOHN GLIAYTONBACKUS; as

Copies of this patent may be obtained for five cents each, by addressing the Commissioner. of. Patent,

Washington, I). 0.? 

